/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.tests.decorators;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.eclipse.core.resources.IResource;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.internal.misc.Assert;

public class TestDecoratorContributor implements ILabelDecorator {

    public static TestDecoratorContributor contributor;

    private Set listeners = new HashSet();

    public static String DECORATOR_SUFFIX = "_SUFFIX";

    public TestDecoratorContributor() {
        contributor = this;
    }

    /*
     * @see ILabelDecorator#decorateText(String, Object)
     */
    public String decorateText(String text, Object element) {
        //Check that the element is adapted to IResource
        Assert.isTrue(element instanceof IResource);
        return text + DECORATOR_SUFFIX;
    }

    /*
     * @see ILabelDecorator#decorateImage(Image, Object)
     */
    public Image decorateImage(Image image, Object element) {
        Assert.isTrue(element instanceof IResource);
        return image;
    }

    /*
     * @see IBaseLabelProvider#addListener(ILabelProviderListener)
     */
    public void addListener(ILabelProviderListener listener) {
        listeners.add(listener);
    }

    /*
     * @see IBaseLabelProvider#dispose()
     */
    public void dispose() {
        contributor = null;
        listeners = new HashSet();
    }

    /*
     * @see IBaseLabelProvider#isLabelProperty(Object, String)
     */
    public boolean isLabelProperty(Object element, String property) {
        return false;
    }

    /*
     * @see IBaseLabelProvider#removeListener(ILabelProviderListener)
     */
    public void removeListener(ILabelProviderListener listener) {
        listeners.remove(listener);
    }

    /**
     * Refresh the listeners to update the decorators for 
     * element.
     */

    public void refreshListeners(Object element) {
        Iterator iterator = listeners.iterator();
        while (iterator.hasNext()) {
            LabelProviderChangedEvent event = new LabelProviderChangedEvent(
                    this, element);
            ((ILabelProviderListener) iterator.next())
                    .labelProviderChanged(event);
        }
    }

}